add ghostty config and theme

configs/ghostty_g/themes/Flatland

@@ -0,0 +1,21 @@
+palette = 0=#1d1d19
+palette = 1=#f18339
+palette = 2=#9fd364
+palette = 3=#f4ef6d
+palette = 4=#5096be
+palette = 5=#695abc
+palette = 6=#d63865
+palette = 7=#ffffff
+palette = 8=#1d1d19
+palette = 9=#d22a24
+palette = 10=#a7d42c
+palette = 11=#ff8949
+palette = 12=#61b9d0
+palette = 13=#695abc
+palette = 14=#d63865
+palette = 15=#ffffff
+background = 1d1f21
+foreground = b8dbef
+cursor-color = 708284
+selection-background = 2b2a24
+selection-foreground = ffffff